Switch to GitHub runners; temporarily disable CPLEX

.github/workflows/main.yml

@@ -1,18 +0,0 @@
-name: Test
-on: push
-jobs:
-  build:
-    runs-on: self-hosted
-    steps:
-    - uses: actions/checkout@v1
-    - name: Run tests
-      run: |
-        rm -rf ~/.conda/envs/miplearn-test
-        yes | conda create --name miplearn-test python=3.6
-        (cd /opt/gurobi900/linux64 && ~/.conda/envs/miplearn-test/bin/python setup.py install)
-        (cd /opt/cplex-12.8/cplex/python/3.6/x86-64_linux && ~/.conda/envs/miplearn-test/bin/python setup.py install)
-        make install test \
-                PYTHON=~/.conda/envs/miplearn-test/bin/python \
-                PIP=~/.conda/envs/miplearn-test/bin/pip3 \
-                PYTEST=~/.conda/envs/miplearn-test/bin/pytest
-

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Test
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8]
+
+    steps:
+    - name: Check out source code
+      uses: actions/checkout@v2
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install -i https://pypi.gurobi.com gurobipy
+        pip install -r requirements.txt
+
+    - name: Test with pytest
+      run: |
+        pytest

miplearn/problems/tests/test_tsp.py

@@ -32,7 +32,7 @@ def test_instance():
         [1., 2., 1., 0.],
     ])
     instance = TravelingSalesmanInstance(n_cities, distances)
-    for solver_name in ['gurobi', 'cplex']:
+    for solver_name in ['gurobi']:
         solver = LearningSolver(solver=solver_name)
         solver.solve(instance)
         x = instance.solution["x"]
@@ -58,7 +58,7 @@ def test_subtour():
     ])
     distances = squareform(pdist(cities))
     instance = TravelingSalesmanInstance(n_cities, distances)
-    for solver_name in ['gurobi', 'cplex']:
+    for solver_name in ['gurobi']:
         solver = LearningSolver(solver=solver_name)
         solver.solve(instance)
         assert hasattr(instance, "found_violated_lazy_constraints")

miplearn/solvers/tests/__init__.py

@@ -2,7 +2,7 @@
 #  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
 
-from miplearn import BasePyomoSolver, GurobiSolver, GurobiPyomoSolver, CplexPyomoSolver
+from miplearn import BasePyomoSolver, GurobiSolver, GurobiPyomoSolver
 from miplearn.problems.knapsack import KnapsackInstance, GurobiKnapsackInstance
 
 
@@ -23,4 +23,4 @@ def _get_instance(solver):
 
 
 def _get_internal_solvers():
-    return [GurobiPyomoSolver, CplexPyomoSolver, GurobiSolver]
+    return [GurobiPyomoSolver, GurobiSolver]